Parnell, who had Tommy John surgery on Apr. 8, hopes to throw off a mound around Christmas, ESPN New York reports. Parnell has been playing catch for three weeks and will throw throughout the winter, rather than shutting it down for the off-season. If he is able to throw off a mound around Xmas, there is a good possibility he will be ready for the beginning of spring training, though the Mets may bring him long slowly.